package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.result.Result;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import javax.swing.*;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.*;

@Service
public class ReportServiceImpl implements ReportService {
    @Autowired
    OrderMapper orderMapper;
    @Autowired
    UserMapper userMapper;
    @Autowired
    WorkspaceService workspaceService;

    /**
     * 营业额统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end))
        {
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        //用StringJoiner存储date字符串
        StringJoiner stringJoiner=new StringJoiner(",");
        for (LocalDate localDate : dateList) {
            stringJoiner.add(localDate.toString());

        }
        //存放日期字符串
        String dateStr=stringJoiner.toString();
        //存放每天营业额
        StringJoiner turnover=new StringJoiner(",");
        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime=LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(localDate, LocalTime.MAX);
            Map map=new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double sum=orderMapper.sumByMap(map);
            sum=sum==null?0.0:sum;
            turnover.add(sum.toString());

        }
        String turnoverStr=turnover.toString();
        TurnoverReportVO turnoverReportVO=new TurnoverReportVO(dateStr,turnoverStr);
        return turnoverReportVO;
    }

    /**
     * 用户统计
     * @param begin
     * @param end
     * @return
     */

    @Override
    public UserReportVO userStatistics(LocalDate begin, LocalDate end) {
        StringJoiner dateJoiner=new StringJoiner(",");
        StringJoiner userSumJoiner=new StringJoiner(",");
        StringJoiner userNewIncreaseJoiner=new StringJoiner(",");
        LocalDateTime timeBegin=LocalDateTime.of(begin,LocalTime.MIN);
        LocalDateTime timeEnd=LocalDateTime.of(begin,LocalTime.MAX);
        Map map=new HashMap<>();
        map.put("timeEnd",timeEnd);
        Integer userSum=userMapper.getUserCount(map);
        map.put("timeBegin",timeBegin);
        Integer userNewIncrease=userMapper.getUserCount(map);
        map.remove("timeBegin");
        map.remove("timeEnd");
        userSumJoiner.add(userSum.toString());
        userNewIncreaseJoiner.add(userNewIncrease.toString());
        dateJoiner.add(begin.toString());
        while (!begin.equals(end))
        {
            begin=begin.plusDays(1);
            dateJoiner.add(begin.toString());
            timeBegin=LocalDateTime.of(begin,LocalTime.MIN);
            timeEnd=LocalDateTime.of(begin,LocalTime.MAX);
            map=new HashMap<>();
            map.put("timeEnd",timeEnd);
            userSum=userMapper.getUserCount(map);
            map.put("timeBegin",timeBegin);
            userNewIncrease=userMapper.getUserCount(map);
            map.remove("timeBegin");
            map.remove("timeEnd");
            userSumJoiner.add(userSum.toString());
            userNewIncreaseJoiner.add(userNewIncrease.toString());


        }
        return new UserReportVO(dateJoiner.toString(),userSumJoiner.toString(),userNewIncreaseJoiner.toString());
    }

    /**
     * 订单统计
     * @param begin
     * @param end
     * @return
     */

    @Override
    public OrderReportVO ordersStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        StringJoiner dateJoiner=new StringJoiner(",");
        dateJoiner.add(begin.toString());
        while (!(begin.equals(end)))
        {
            begin=begin.plusDays(1);
            dateList.add(begin);
            dateJoiner.add(begin.toString());
        }
        //总订单数
        int orderCount = 0;
        //有效订单数
        int validOrderCount = 0;
        //字符串格式的每日订单数列表
        StringJoiner orderCountList=new StringJoiner(",");
        //字符串格式的每日有效订单数列表
        StringJoiner validOrderCountList=new StringJoiner(",");
        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime=LocalDateTime.of(localDate,LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(localDate,LocalTime.MAX);
            Map map=new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);
            Integer orderCountDay=orderMapper.getCount(map);
            orderCountList.add(orderCountDay.toString());
            orderCount=orderCount+orderCountDay;
            map.put("status",Orders.COMPLETED);
            Integer validOrderCountDay=orderMapper.getCount(map);
            validOrderCount=validOrderCount+validOrderCountDay;
            validOrderCountList.add(validOrderCountDay.toString());

        }
        double rate=(double) validOrderCount/orderCount;
        System.out.println(rate);
        return new OrderReportVO(dateJoiner.toString(),orderCountList.toString(),validOrderCountList.toString(),orderCount,validOrderCount,rate);

    }

    @Override
    public SalesTop10ReportVO top10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime=LocalDateTime.of(begin,LocalTime.MIN);
        LocalDateTime endTime=LocalDateTime.of(end,LocalTime.MAX);
        List<GoodsSalesDTO> list=orderMapper.top10(beginTime,endTime);
        StringJoiner nameList=new StringJoiner(",");
        StringJoiner numberList=new StringJoiner(",");
        for (GoodsSalesDTO goodsSalesDTO : list) {
            numberList.add(goodsSalesDTO.getNumber().toString());
            nameList.add(goodsSalesDTO.getName());
        }

        return new SalesTop10ReportVO(nameList.toString(),numberList.toString());
    }



    /**
     * 导出运营数据报表
     * @param response
     */
    public void export(HttpServletResponse response) {
        //1. 查询数据库，获取营业数据---查询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //2. 通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);

            //获得第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //3. 通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }



}
